Doucet



(No Model.) 5 Shets-Sheet 1.

P. D 0U C ET. SEWING MACHINE.

No. 457,578. Patented'Aug. 11, 1891.

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5 Sheets-Sheet 2 -(No Model.)

F DOUCET SEWING MACHINE.

No. 457,578. Patented Aug. 11, 1891;

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F DOUCET SEWING MACHINE.

No, 457,678'. Patented Aug. 11, 1891.

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BDOUCET. SEWING MACHINE.

No. 457,578. Patented Aug. 11, 1891.

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No. 457,578. Patented Aug'. 11, 1891.

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Y UNITED STATES PATENT GEEICE.

FELIX DOUCET, OF MONTREAL, CANADA.v

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 457,578, dated August 11, 1891.

Application filed February 7, 1891. Serial No. 380,552. (No model.)

To all whom t may concern:

Be it known that I, FELIX DOUCET, of Montreal, in the Province of Quebec, Canada, have invented certain new and useful Improvements in Sewing-Machines, ot' which the following is a specilication.

vThis invention has for its object to provide a simple and effective lock-stitch wax-thread sewing-machine adapted to stitch uppers to soles of turned boots or shoes and to stitch welts to uppers and inner soles of welted boots or shoes; and to this end it consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure l represents an elevation of one side of a wax-thread sewing-machine embodying my invention. Fig. 2 represents an elevation of the opposite side of the same. Fig. 3 represents a front Fig. et represents an enlarged side elevation of the fixed shuttle and the rotating ring surrounding it, the cap covering the side of the shuttle being removed. Fig. 5 represents a section on line 5 5, Fig. 4. Figs. 6, 7, and 8 represent perspective views showing dierent steps in the operation of forming the stitch. Fig. 9 represents a detached view of the loop-spreader and its operating devices. Fig. l0 represents a detached view of the needle and the means for oper ating it; and Fig. ll represents a perspective view of the feed-dog.

In the drawings, a represents a suitable supporting frame or head having bearings for the driving-shaft b, which is rotated by power applied in any suitable way.

crepresents a curved needle, which is attached to an oscillating arm cl, mounted on a bearing e, and is oseillated by means presently described to cause the needle to alternately penetrate and recede from the work.

f represents a looper, which is adapted to present the needle-thread g to the barb of the needle when the latter is projected.

The needle and looper may be arranged and operated in any suitable way and they form of themselves no part of my invention. In fact all the parts of the stitch-forming mechanism of a curved-needle sewing-machine, excepting as hereinafter provided, may be the same as inV many vof the wellknown machines now in use, and my present invention resides mainly in the rotating ring or case inclosing the shuttle or the cap when no shuttle is used, the devices for supporting and rotating said ring, the loop-spreading device, and the feed-dog which enters the channel of a boot or shoe sole and is adapted to feed the work, all as hereinafter fully described.

y m represents a rotary ring or case, which is formed to receive the supply from which the lower thread g is drawn. The supply of lower thread maybe in the form of a cop inserted without a shuttle in the cavity in the ring or case, although in the present instance I have shown a shuttle i, adapted to contain the cop and formed to he contained in the cavity or interior of the ring. Said shuttle is of cylindrical form and is provided with a removable cover-i', which holds the cop in place, and is secured to the side of the shuttlpx in' any suitable way, said cover having an orifice la at its center for the passage of the shuttle-thread g from the center of the shuttle. f

. The ring m is rotated by means of a spurwheelp, which is driven by a connection with the driving-shaftb, and is provided with teeth p', entering recesses gin the periphery ot' the ring.

The ring` m is provided with hooks Vr 2'," which are formed to engage the loop drawn:

through the work by the needle, as shown in Fior. S. f

. represents a loop-spreader, which is oscillated in such a path that when moving in one direction it engages one strand of the` needle-loop, as shown in Fig. 7, and spreadsy the loop and holds it in substantially the p0- sition shown in Fig. 8, so that the hooks r" r are caused to engage the needle-loop and carry it around the shuttle, the needle-loop being thus interloeked with the shuttle-thread.

The Work to be stitched, which is here shown as a boot or shoe mounted on a last, is

presented to the machine by the operator, who in this case holds the stitch-receiving channel or groove in the outer face ot the sole IOO gage the material of the sole sufficiently to enable it to feed the work, as presently described. The work abeing held in this position, the needle advances and penetrates the upper and the portion of the sole known as the between substance and emerges from the channel, as shown in Fig. 6. The looper then moves to press the needle-'thread against the hook side of the needle, so that when the needleis retracted it draws a loop through the between substance and the upper, as shown in Fig. 7. The loop-spreader moves in the direction indicated by the arrow in Fig. 7, while the loop is held by the retracted needle, and is thus caused" to spread the loop just as the hooks lr 1' are brought by the rotation of the ring fminto position to enter the loop. Said hooks engaging the loop carry it over the ring mand around the rear side of the shuttle, the loop being disengaged from the hooks and tightened or taken up by the take up mechanisms presently described, while the hooks are moving downwardly toward the lowest point of their movement.

The loop is thus carried laround the shuttle and interlocked with the shuttle-thread.

The ring or case m' is held in engagement with its driving-wheel by means of suitable f idle-rolls u 11 bearing at dierent points on its periphery. The roll 1; is journaled in fixed bearings in the frame a. I prefer to employ a series of rolls u, mounted on the end of a pivoted arm w, which is movable, so that the rolls u may be adjusted to bear against and support the ring or case m or to be depressed to permit the removal of the said ring or case m, The arm w is here shown as attached to the frame a, by a clamping-screw w', which, when tightened, rigidly supports the arm, and when loosened permits the arm and the rolls u to be lowered. The arm w may have but one roll u instead of a series. The peripheries of the roll u are cut away to permit the revolving movement of the hooks fr 1'.

Any suitable mechanism for giving motion to the devices above described may be em-v ployed, and I will now describe suitable opererating devices, although I do not limit myself thereto.

The needle is oscillated bymeans of a camgroove in a disk 2 on the driving-shaft, a lever 3, pivoted at 4 to the supporting-frame and having a trundle-roll 6, entering said cam-groove, and a connecting-rod 7, which connects the lever 3 with the 'needle-arm d. The looper f is attached to a rock-shaft 9, which is adapted to oscillate and to move endwise in bearings 10 IO on the supporting-frame. Said shaft is moved endwise by means of a lever 12, which is pivoted at 13 to the supporting-frame, and a cam-groove 14, engaged with a trundle-roll 15 on the lever 12. The swinging end of lever 12 has a slot which receives a stud 9 on the shaft 9. The said shaft is oscillated by means of a pivoted lever 10', engaged at one end with a cam-groove and at the other end with an arm 12', affixed to the shaft 9. These two motions-viz., the

longitudinal and oscillating motions-of the rock-shaft-are timed to give the looper. f the kmovements required to cause it to present the thread to the barb of the needle. The wheel p, which rotates the ring m, is connected by a rod or pitman 16 with a lever 17, which is pivoted at 1S to the supporting-frame, and is provided with a trundle-roll 1S', entering a cam-groove in a disk 19 on the shaft b. The lever 17 is oscillated by the rotation of the disk 19 and imparts a reciprocating motion to the rod 16. Said rod has a trundleroll 20, which enters a cam-groove in another disk on the shaft b, said cam-groove being formed to give the rod 16 an oscillating movement while it is being reciprocated, the coml bined movements thus imparted to the rod 16 causing it to rotate the wheel p. The loop-spreader s is a curved arm attached to a rock-shaft 24, which is adapted to turn in ixed bearings 25 25. (See Fig. 9.) Said rockshaft has an arm 26,provided with a trundleroll 27, engaged with a cam-groove in one of the disks on the driving-shaft. Said camgroove is timed to give the loop-spreader its required operative movements. dog 15 is provided with a point or spur 15', Figs. l and ll, which is adapted to enter the channel 152 of a sole,'and is formed to penetrate the between substance atthe bottom of the channel, so that said feed-dog will be engaged with the work and feed the same. The depth of the penetration of the point or spur t into the work is limited by a shoulder 15 on the dog t, Fig. 11, said shoulder being broad and thin, so that it can enter the channel and bear on the bottom thereof, and by its extended bearing on said bottom prevent the point or spur 15 from passing entirely through the between substance and into the upper. The feed-dog 15 is attached to a hub or collar 153, which is adapted both to oscillate and move laterallyon a horizontal stud 154 on the frame a.

155 represents a lever pivoted at z56 to the frame a and provided at one end with a trundleroll t1, engaged with a cam-groove 151, Fig. 3, in a disk 1512 on the driving-shaft. The other end of said lever is forked and provided with studs 159 159, which enter grooves in the hub yor collar 153. The lever t5 is oscillated horizontally by the cam-groove 1510 and imparts lateral reciprocating movements to the hub t3 and feed-dog z5. Said hub has an upwardlyprojecting arm 1513, which has teeth at its upper end engaged with rack-teeth 1511 on a slide 1515. Said slide is movable horizontally in a The feed- TOO IIO

fixed guide, and is reciprocated by means of thereby caused to enter and withdraw from the channel.

The described'feetl-dogoperating mechanism is so timed that the feed-dog is moved forward into the channel, and is withdrawn suiciently from the bottom ofthe channel to disengage the point or spur t from the between substance during the movement oppo-V site to that which feeds the work.

A represents the back gage, which supports the work against the inward pressure exerted upon it by the operator. Said gage is attached to a slide A', which is movable in a guide in the frame a, and is normally pressed outward toward the feed-dog by a Y springB, (when the back gage is not retracted by the mechanism presently described,) so that the gage is adapted to conform to the surface of the boot or shoe which requires a varying distance between the back gage and the feed-dog. The back gage is locked during the operation of forming the stitch by means of a locking-dog C on an arm of abellcrank lever D. The other arm of .said lever has a trundle-roll E, which is pressed by a spring F against one side of the disk t1?. Said disk has a cam projection G, ,which co-oper ates with spring F in oscillating bell-crank lever D. The dog C is thus alternately raised and lowered. When raised, it engages one of a series of teeth H on the slide A' and locks said slide and the back gage to enable the latter to firmly support the work during the formation of a stitch. The back gage is retracted while the work is beingfedby means of a lever I, pivoted at J, to frame ct, and connected atone end by a rod L with a camgroove (not shown) in one of the disks on the driving-shaft. The other'end of lever I is adapted to play between two shoulders M M" on slide A' and strikes the shoulder M to retract the back gage.

The take-up mechanism consists of two parallel slides O O', having thread-receiving pulleys P P', arranged as shown in Fig. 1, the pulleyP being on one end of slide O and the pulley P' on the opposite end of slide O. Said slides are adapted to move in guides on frame a, and are provided with rack-teeth Q on their adjacent edges, with which a pinion R is engaged, said pinion being mounted on a bearing affixed to frame CL. The slide O is connected by a rod S with a lever T, which is pivoted at T' to frame a., and has a trundleroll T2, Fig. 2, engaged with a cam-groove (not shown) in one of the disks on the driving-shaft. The slide O is reciprocated by the lever T and imparts a movement in the opposite direction to the slide O' through the pinion R. The thread-pulleys P P are thus caused to alternately approach and recede from each other, the needle-thread g being taken up bythe movement of said rolls away from each other and loosened by the movement of said rolls toward each other. The pulley P is mounted on an arm P2, which is pivoted at P4 to an ear on slide O', and is acted on by a spring P3, so that pulley P eX- erts a yielding tension on the thread. This take-u p mechanism is simple and is adapted to be operated with less expenditure of power than any other of which I am aware, the taking-up movement being divided between the two slides Q O', so that the leverT that gives motion to said slides has to move only half as far as it otherwise would. The needlethread passes from the usual wax-pot (not shown) around the pulley P', and from thence back over the pulley P, and then over a guiding-pulley P on a iixed bea-ring and through a iiXed guiding-eye P7 to the looper.

It will be seen that the ring or case fm, holding the lower thread, is arranged with its axis about parallel with the direction of the feed movement of the work and well back of or behind the feed-dog. The said ring being narrow does not obstructV the space around the back gage and feed-dog. Hence the boot or shoe being stitched may be freely moved to any position that the convenience of the operator may require without obstruction by the ring or case fm. The freedom of movement of the work is further increased by the arrangement of the feed-dog and its operating mechanism, the feed-dog carrying hub or collar t3 being elevated considerably above the point where the stitches are formed, while the shank of the feed-dog is inclined from said hub, as shown in Fig. 3, so that there is plenty of room at the right of the feed-dog for the boot or shoe sole to be inclined upwardly or-in any other direction required.

I am enabled by the described improvements to use a lock-stitch in sewing turned and welted shoes, the stitch-forming mechanism being arranged, as stated, to permit all the freedom of movement of the work that can possibly be desired.

I am not aware that prior to my invention the stitch-formingmechanism'of alock-stitch sewing-machine has ever been arrangedso that it can be used in combination with a back gage to support the upper and a dog or finger to enter the channel of a turned or welted boot or shoe. I am aware that chainstitch-forming mechanism has been used in connection with a back gage and a channelgage, as in the well-known Goodyear sewingmachine; but in such machines the advantages of a lock-stitch cannot be secured. The machine is here shown as adapted to connect the upper and sole of a turned boot or shoe; but it will be readily seen that the machine may be adapted for sewing a welt to an upper and an inner sole by providinga suitable welt-guide.

I claiml. The combination of a rotary ring or case adapted to contain the lower thread and provided With hooks projecting outside of its periphery to engage the needle-loop, a spreader for the needle-loop, idle-rolls supported in position to bear on and support the ring, and means for rotating the ring, as set forth'.

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2. The combination of a rotary ring or case adapted to contain the lower thread and provided with hooks projecting outside of its periphery to engage the needle-loop, a spreader for the needle-loop, means for rotating said ring,idle-rolls bearing on the periphery of the ring, and a movable support for one or more of said rolls, whereby the ring is adapted to be removed from the machineas set forth.

3. The combination of a rotary ring provided with hooks projecting outside of its periphery to engage the needle-loop, aspreader for the needle-loop7 a shuttle removably inserted in said ring, and idle-rolls supported in position to bear on and support the ring, as set forth.

4. The combina-tion of a non-rotating shuttle, a rotary ring surrounding said shuttle and provided with hooks projecting outside of its periphery to engage the needle-loop, the positively-rotated driving-wheels engaged with the periphery of the ring, and idle-rolls bearing on other portions of the periphery of the ring.

5. In a sewing-machine, the combination,

with a back gage and stitch-forming devices, of a feed-dog having a iiat thin end or edge, the line of which is in the direction of the feed movement of said dog and parallel with the work-supportin g surface, whereby the said dat edge may enter to the bottom of the channel of a shoe-sole, and said dog having a point or spur projecting beyond the said edge to pen etrate the work, substantially as described.

G. The combination,l with a back gage and lock-stitch-forming mechanism, substantially as described, of a feed-dog, a hub or collar elevated above thefeed-dog and secured to the shank of said dog, the toothed arm 13 on said hub, the reciprocating rack engaged with said arm, and the oscillating lever t5, engaged with the hub, as set forth.

In testimony whereof I have signed my name to this specification, in the presence ot' two subscribing Witnesses, this 10th day ot January, A. D. 1891.

FELIX DOUCET.Y Witnesses:

C. F. BROWN, A. D. HARRISON.y 

